No abstract

The internal conversion electrons and the gamma-rays emitted by Samarium after neutron capture were measured by means of a betaspectrometer and a bent-crystal spectrometer at the research reactor at Garching near Munich. Lines corresponding to 50 transitions between 59 keV and t"7 MeV were found with the betaspectrometer. The measurement with the crystal spectrometer showed I1 lines between 250 keV and 740 keV. The multipolarity of a few lines was determined. A level scheme containing most of the measured lines is suggested.

We have tried three methods of measuring the polarizations of beams of thermal neutrons reflected from magnetized mirrors. These methods were based on (a) depolarizers, (b) a current-carrying foil (Dabbs foil), and (c) a Stern-Gerlach magnet. The Stern-Gerlach method appears to be the most reliable; with reasonable care it is accurate to ±1%.

We measured the internal conversion electrons of Au 198 following thermal neutron capture with a beta spectrometer. 130 lines were found between 1 keV and 7 MeV. The multipolarities of 81 lines were determined. A level scheme with 10 levels containing most of the intensive transitions is suggested.